Function installPopupPrintObserver

src/native_pdf_export_patch.ts:168–258

(
	session: NativeExportSession,
	plugin: CodeSpacePlugin,
	popupWindow: Window
)

}

function installPopupPrintObserver(
	session: NativeExportSession,
	plugin: CodeSpacePlugin,
	popupWindow: Window
): () => void {
	let cleanedUp = false;
	let observer: MutationObserver | null = null;
	let intervalId: number | null = null;
	let unloadHandler: (() => void) | null = null;

	const cleanup = () => {
		if (cleanedUp) return;
		cleanedUp = true;
		observer?.disconnect();
		if (intervalId !== null) {
			session.ownerWindow.clearInterval(intervalId);
		}
		if (unloadHandler) {
			popupWindow.removeEventListener("beforeunload", unloadHandler);
			popupWindow.removeEventListener("unload", unloadHandler);
		}
		session.popupCleanups.delete(cleanup);
		session.popupOpened = false;
		maybeCleanupSession(session, "popup closed");
	};

	const scanPopup = () => {
		if (popupWindow.closed) {
			debugNativePdf(session, "popup window closed");
			cleanup();
			return;
		}

		const popupDoc = popupWindow.document;
		const popupBody = popupDoc.body;
		if (!popupBody) {
			return;
		}

		const printRoots = Array.from(popupDoc.querySelectorAll<HTMLElement>(".print"));
		const fileEmbedCount = popupDoc.querySelectorAll(".file-embed").length;
		const signature = `print:${printRoots.length}|embed:${fileEmbedCount}`;
		if (session.lastPopupScanSignature !== signature) {
			session.lastPopupScanSignature = signature;
			debugNativePdf(session, "popup scan state changed", {
				printRoots: printRoots.length,
				fileEmbeds: fileEmbedCount,
				url: popupWindow.location.href,
			});
		}

		if (printRoots.length > 0) {
			for (const root of printRoots) {
				void replacePopupCodeEmbeds(root, plugin, session.sourceFile.path);
			}
			return;
		}